There is a much larger number of people who can do electrical work than those who are "electricians". We will instead see more people doing their own work, mostly with success.

Regardless, dry walling, stud framing, roof trussing, foundations, plumbing, gas fitting, electrics, etc are all umbrella'ed under "blue collar work".

Those who can, will, those who can't won't - and in response to the question posed, those who can no longer afford will either have to learn how or put up with decay creep.